Photon-counting CT apparatus
AssigneeToshiba Medical Systems Corporation
InventorEmi Tamura
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a photon counting CT apparatus includes an X-ray source, a photon counting CT detector, and a calibration unit. The X-ray source includes a cathode configured to generate electrons and an anode including a plurality of targets configured to generate a plurality of characteristic X-rays having different energies. The photon counting CT detector detects X-ray photons generated by the X-ray source. The calibration unit calibrates the gain of the photon counting CT detector based on the correspondence relationship between the photon energies of the plurality of characteristic X-rays and outputs from the photon counting CT detector.
Claims16
A photon-counting CT apparatus, comprising:
- an X-ray source including a cathode configured to generate electrons and an anode having a plurality of targets configured to generate a plurality of characteristic X-rays having different energies;
- a photon-counting CT detector configured to detect X-ray photons of the plurality of characteristic X-rays generated by the X-ray source;
- and
- a calibration circuit configured to calibrate a gain of the photon-counting CT detector based on a correspondence relationship between photon energies of the plurality of characteristic X-rays and outputs from the photon-counting CT detector.
A photon-counting CT apparatus, comprising:
- an X-ray source including a cathode configured to generate electrons and an anode having a plurality of targets configured to generate a plurality of characteristic X-rays having different energies;
- a photon-counting CT detector configured to detect X-ray photons of the plurality of characteristic X-rays generated by the X-ray source;
- and
- a calibration circuit configured to determine a correspondence relationship between photon energies of the plurality of characteristic X-rays and outputs from the photon-counting CT detector,
- wherein the photon-counting CT detector comprises an X-ray detector configured to detect an X-ray photon of the plurality of characteristic X-rays from the X-ray source and a signal processing circuit configured to generate count data based on the detected X-ray photon by the X-ray detector, and
- the signal processing circuit is configured to correct the count data based on the correspondence relationship.
Dependencies are inferred from the claim text.